/*正文*/
        .content{
            margin-top: 50px;
        }
        
       .article{
       	margin-top: 20px;
       }
       .article div span{
       	  text-indent: 2rem;
       }
        
        
         footer{
           
            height: 100px;
            width: 100%;
            margin-top: 50px;
            background-color: white;
            color: gray;
            /*background-color: chocolate;*/
        }
        footer span{
        	position: absolute;
        	margin-top: 30px;
            line-height: 30px;
        }
        footer nav{
            float: right;
            line-height: 30px;
            margin-top: 30px;
        }
        footer nav a{
            color: gray;
            padding-left: 15px;
        }
        @media (max-width:1200px){
            footer span{
            	position: absolute;
                line-height: 50px;
            }
        }
        @media (max-width:992px){
           
            footer{
                height: 80px;
                text-align: center;
                padding-top: 10px;
            }
            footer span{
            	position: relative;
                line-height: 30px;
            }
            footer nav{
                float: none;
                line-height: 30px;
            }
        }
        @media (max-width:768px){
            footer span{
            	position: relative;
                line-height: 10px;
            }
             footer nav{
                float: none;
                line-height: 20px;
            }
            footer nav a{
                padding-left: 5px;
            }
        }
        @media (max-width:320px){
            footer span{
            	position: relative;
                line-height: 30px;
            }
             footer nav{
                float: none;
                line-height: 20px;
            }
            footer nav a{
            	font-size: 12px;
                padding-left: 4px;
            }
        }